Integrable spin chains associated with sl_q(n) and sl_p,q(n)

The Hopf structure of the central extension of the U_q(sl(n)) algebra is considered. The intertwine matrix induces new integrable chain models. We show the relation of these models and the biparametric spin chain sl_p,q(n) models. The cases n=2 are n=3 are discussed, and for n=2 we obtain the model of Dasgupta and Chowdhury (1993). The case n=3 is solved by the nested Bethe ansatz method, and the dependence of the Bethe equations on the second parameter introduced is demonstrated.